Expressions
3x + 4y + 2x + 3y
5x + 7y
3x + 4 = 25
x = 7
In the equation y = kx, which letter represents the constant of proportionality?
k
0.15
The radius of a circle is 5 inches. What is the length of the diameter?
10
4(2n + 3) + 2(n + 1)
10n + 14
What symbol is this? <
Less than
Is it proportional?
x y
2 10
3 15
4 20
yes
What is 20% of 80?
16
The radius of a circle is 5 inches. What is the length of the circumference in terms of pi?
10pi
3x + 1 - 5x - 4
-2x - 3
Write an equation:
Sami bought a drink for $1.50 and some bags of chips for $0.50 each. He spent a total of $4.00.
Is it proportional?
x y
2 20
4 30
6 40
no
0.85x
The radius of a circle is 5 inches. What is the area of the circle in terms of pi?
25pi
4(n + 1) - 2(n - 3)
2n + 10
3x - 4 > 11
x > 5
The graph of a proportion must have what two things?
straight line through the origin (0, 0)
What is the percent increase from 24 to 30?
25%
The circumference of a circle is 22pi inches. What is the radius of the circle?
11 inches
3x(2y - 3) - 3y(2x + 5)
-9x - 15y
Gia had $30 to spend at the store. If she buys a shirt that costs $11 and spends the rest of her money on $5 pins, what is the greatest number of pins she can buy?
3 pins
What is another term for the constant of proportionality?
unit rate
A shirt that normally costs $45 is on sale for 25% off. What is the final price of the shirt?
$33.75
The area of a circle is 100pi square centimeters. What is the length of the diameter?
20 centimeters